Hammer-drill.



AJH. TAYLOR. HXHMEB DRILL. APPLIOAIIDN FILED 00T.1. 1907.

.Hmmm Aug. 3o, `1910.

y UNITED STATES PATENT oEEicE.

ALBERT H. TAYLOR,v OF EASTON, PENNSYLVANIA, ASSIGNOR T0 INGERSOLL-RAND COMPANY, OF NEW YORK, N. Y., A CORPORATION OF NEW JERSEY.

HAMMER-DRILL.

Slieccation of Letters Patent.

Patented Aug. 30, 1910.

Application led October 1, 1907. Serial No. 395,388.

To all whom fit may concern:

Be it known that I, ALBERT H. TAYLOR, a citizen of the United States, and resident of Easton, in the county of Northampton and State of Pennsylvania, have invented a new and useful Improvement in Hammer-Drills, of which the following is a specification.

My invention consists in certain improvements in that class of pneumatic tools known as hammer drills in which an air power feed is provided for forcing the tool forward and holding it in its working position.

The object of my invention is to provide a controlling valve in the head block of the drill, which valve is so constructed and arranged t-hat it may be operatedA to control the admission of air to the air feed and to the hammer at pleasure thus rendering the machine easy to handle and to set up.

'A further object is to provide a tool in which the controlling valve is held onto its seat by air pressure whereby the wear is taken up automatically.

My invention further consists in means for automatically locking the controlling valve in its various positions so as to prevent the same from being moved out of its de` sired position by the jars incident to the operation of the tool.

Practical embodiments of my invention are represented in the accompanying drawings, in which- Figure 1 represents a portion of an air feed hammer drill, partially in side elevationy and partially in longitudinal central section, with my improvements applied thereto, the controlling valve being in position to close communication from the air supply bot-l1 to the air feed and to the hamnier, the air feed being in open connnunicaf tion with atmosphere, Figs. 2 and 3 are detail sections showing the location of the several ports when the valve i.' in the position shown in Fig. 1, Fig. 4 is a detail view partially in section and partially in side elevation. the controlling valve heilig shown in position to open the air supply to the air .feed and close communication between `the air supply and the hammer, the eonnnuniea communication between the air supply and both the air feed and hammer, communication between the air feed and the atmosphere being closed, Figs. 8 and 9 are detail sections` showing the location of the ports when the valve is in the position shown in Fig. 7, Fig. 10 is a detail top plate, and Fig. 11 1s a view of a portion of lan view of the locking a hammer drill of slightly modified form in which the piston rod 1s attached to the head block instead of the air feed cylinder as shown in Fig. 1. ,f i

The hammer cylinder is denoted by 1, and its head block by 2.

In the preferred form, the air feed cylinder 3 is attached directly to the head block 2 while in the form shown in Fig. 11, the piston rod 4 is attached to the said head block.

In the form shown in Fig, 1, the head 5 df ,the "piston rod 4 is fitted to; slide in the air feed cylinder 3 and the rod 5 extends rearwardly through the outer end 6 of said cylinder to form the rear support for the tool. Air ducts 7 lead from the space back of the piston head 5 to atmosphere.

The head block 2 of the tool is provided with a hole therethrough, a portion of which forms a taper seat 8 for the tapered portion 9 of a controllin valve. portion 10 of sai valve at the endof its tapered portion is provided with an angular portion 11 on which is fixed the locking -plate v12 and the handle 13 of the valve exterior to the head block. This locking plate 12 has its inner face adjacent to the outerface of the head blockand is provided with three shallow recesses 14, 15 and 16, arranged lto respectively receive and retain against unintentional removal the rounded end ot' a spring actuated sliding in 17 mounted \in the .head block. The ocking plate 12 is further provided With'shoulders 18, 19, arranged to engage the rojecting end of a stop 2() on the head bloc t for limiting the rotary movement of the controlling Valve in boh directions. A

An air siipply pipe 21 is secured to the head block 2 by a collar 22 vhaving a screw threaded engagement withi'the hole in the head block beyond its ta er seat 8. The controlling valve is Iprovi ed with a chamber 23 in open communication with the air supply pipe 21.

Torts 24 and 25 lead ,from the chamber 23 The cylindrical.

' port 30. 'Ports 31.and 32 in the same plane 15. The next movement of the valve into this to the seat 8 in the head block. Ports 26,!

and 27 lead respectively from the seat 8 to the air feed space 28 and to the hammer feed space 29,l said ports being in the same plane as the valve ports 24 and 25. The valve is further provided with a through'l as the through port 30 lead from the valve seat 8 respectively to the air feed space 28 and to the external atmosphere.

In the form shown in Fig. 11, the construction of the controlling valve and the head block is the same as in the form shown in Fig. y1. Instead of the air feed cylinder '3 being secured directly to the head block, the piston rod 4 is secured directly to the head block and it lextends rearwardly through the inner end 33 of the cylinder 3, the outer end of said cylinder being provided with a rearward extension 34 for forming the rear support for the tool. In this form the space in front of the piston head 5 is at all times open through atmosphere through the ports 35 in the end 33 and the piston rod 4 is made hollow for opening communication to the space at the other end of the said piston head. In opei'ation, supposing the parts'to be in the position .shown in Figs. 1 2 and 3,'the air supply Will be shut olf from the a1r feed and from the hammer. The air feed will be open to external atmosphere through the ports 31,30, 32, when the valve is in this position. Also the shoulder 1.94 of the locking plate on the valve will be'in engagementV with the stop 20 and the locking pm 17 will be located within its socket 14. The movement of the valve into the position shown in Figs. 4, 5 and 6, will close communication from the air feed to-external atmosphere and will open communication from the air feed to the air supply but will not open the air supply to the hammer. lVhen the parts are in this position, the tool will be automatically fed up to its work and held by the air feed. 'llic valve will be held against unintentional movement by the engagement of the spring actuated pin 17 withits socket the position shown in l4`ig's. 7, S and 9, will bring the air supply into open communication Vwith the hammer and still keep the communication open between the air sup ply and the air feed thus stai-timer the operation of the tool. The valve is stopped 1n osition by the engagement of the shoul( er 18 on the locking plate with thev stop 20 arid is held in such position against unintentional removal byv the engagement of the spring actuated pin 17 with its socket 16.

By returning the controlling valve to its original position shown in Figs.` 1, 2 and 3, the air 'oply is cut off from both the hainposition to nier and -he air feed and the air feedis all wear between the valve and its seat is taken up automatically by the constant air pressure from the air supply.

Furthermore,

means are provided for lockingV the valve in its several positions against unintentional removal. Also, in the form shown in Fig. 1, a very rigid structure is obtained, by the direct attachment of the air feed cylinder to the h ead block instead of the attachment ofv the air feed piston to the head block.

While the invention has been described in connection with drill any'other fluid and any type of tool may be employed without departing from the spirit and scope of iiiy invention.

Vliat I claim is L'In an air feed hammer drill, a. head block, an air supply, an air feed cylinder,

its piston and a manually operated valve iii the head blockwheii in one between the having passages airan ed position to open communication air supply and the air feed cyl.-

`inder and close communication between the and hammer and when in another open communication between the air supply, the airfeed cylinder and the hammer.

2. In an air feed hammer drill, a head block, an air supply, an air `feed cylinder, its piston and a manually voperated valve in the head block having passages arranged when 1in its first position to open communication bitween the air :t'eed cylinder and external atm/'isphere and close communication between the air supply, the air feed cylinder and the hammer; when iii its second position to close communication between the air feed cylinder and external atmosphere and between the air supply and hammer and to open communication between the air supply and air feed cylinder; position to open communication between the air supply, the air feed cylinder and the hammer.

3. In a-n air feed hammer drill, a. head block, au pistou, a manually operated valve in the head block for controlling communication betweenthe air supply, the air feed cylinder air supply and the hammer and, means for automatically'locking tli'el valve in its ditl'ereiit positions agaiiist unintentionaly displacement.

4. [n an air feed hammer drill, a head block, an air supply, an air feed cylinder, its

and when in its third air su l an air feed crlinder. its 7 an air powe; feed hammer i power may be utilizedpiston, a manually operated valve in the head block for controlling communication between the air supply, the air feed cylinder and the hammer, and means for automatically locking the valve in its different positions againstl unintentional displacement comprising a llocking plate on the valve having sockets therein and a spring actuated pin mounted in the head block arranged to enter the socket which is brought into alinement therewith.

5. In an air feed hammer drill, a hammer cylinder, an air feed cylinder, a head block interposed between the two cylinders, an air supply and a manually operated valve seated in the head block having a `chamber therein communicating with the air/ supply and having ports therein for controlling communication between tlie air supply, the air feed cylinder and the hammer, the pressure of the air supply serving to `hold the valve snuglyin its seat.

(l. rllie combination with a pressure fluid tool, of pressure fluid feeding means therefor, a,single controlling device for said tool and feeding means, said device being adapted to be moved to one or more positions iiiterniediate its extreme positions` and positioning means for said controlling device operative in anyone ofthe said positions.

7. The combination with a pressure fluid tool, of pressure fluid feeding means therefor, and -a controlling throttle for said tool and said feeding means adapted to admit the pressure fluid, first to the feeding means and then to .the tool, Without interrupting the supply of pressure fluid to the feeding means.

A8. The combination with a pressure fluid tool', of pressure fluid feeding ineanstherefor, and a controlling device adapted to admit pressure fluid to the feeding means and there maintain the supply while varying the pressure fluid admitted to the tool.

9. The combination with-a pressure fluid tool, of pressure fluid feeding means therefor, a controlling device having a plurality of positions, whereinthe said device may admit pressur fluid to said tool iii varying amounts, and a pressure'fluid supply passage leading to said feeding means and controlled by said controlling device, said device acting to supply pressure fluid through said passage to sai feeding device in each of several positions wherein pressure fluid is admitted to said tool.

10. The combination with a pressure `fluid tool, of pressure fluid feeding means therefor aliiied therewith, and throttling means both for the tool and the feeding means and located in a space between the same.

1l. The combination with a pressure fluid tool, of pressure fluid feeding means therefor, and a controlling device having a plurality of positions, said device in one position shutting off pressure fluid from said tooland feeding means, in another posit-ion admitting pressure fluid toy 'said feeding means only, and in a third Aposition admit.- ting pressure fluid to said feeding means and said tool, said device passing from said ing means.

12. In a structure y of the character set forth, the combination with a motor, of feeding means connected thereto and comprising a cylinder and a piston operating in the cyl-1 iiider, and means for supplyin motive fluid to the motor independently 0 the cylinder and piston, said supplying means also supplying motive fluid to the cylinder and including common means for controlling the supply of motive fluid to both the motor and feeding means and toone separately from the other.

forth, the combination with a motor, of feeda cylinder and a piston operating in t -e cyliiider, and means for supplying motive fluid to the cylinder and also to the motor, independently of said cylinder said supplying means including common means-for controlling the supply of motive fluid to both the motor and feeding means and to one separately from the other.

14. ln a 'structure of the character set forth, the combination with a motor, of feeding means connected thereto and comprisinfr a cylinder and a piston operating in the cylinder, and means for supplying mo-. tive Huid to'the cylinder and also to the motor independently of said cylinder, said supplying means including a single valve for controlling the supply of motive fluid toV both the motor and feeding means and to' one separately from the other.

15. In a structure of the character set forth, feeding means the combination with a motor, of therefor including a cylinder the cylinder member, a connection between one of the members and the motor, and a valve mechanism located in the connection for separately controlling the supply of motive fluid to the feeding means and feeding means and motor.

16. In a structure of the character set foi-th, the combination with a motor, Yof feeding means therefor including a cylinder 'member and a piston member operating in the cylinder member, a connection between one of the members-and the motor interposed between the same, saidconnection having ports respectively leading to the feeding means and to the motor, and a motive fluid controlling valve having supply ports that are movable into and out of coaction with the first mentioned ports.

13. In a structure of thev character set` ing means connected thereto and com rising to t-he second to sai d third position acting to maintain admission of pressure fluid to the feedl member and a piston member operating inl y 17. In a structurx-l of the'character set forth, the combina/mon with af motor, of feeding means therefor including a cylinder and a iston operating in the cylinder, a connectlon between .the cylinder and the motor interposed between the two, said connection havmg a valve seat and ports leading from the seat and communicating respectively with the motor and the cylinder, a rotary valve having ports that are movable intoy and out ofcoaction with the first mentioned orts, and means for supplying motive fluid) to the`valve. q

18. In a structure'of the character set forth, the combination with a motor, of fluid operated feeding meansI therefor, a valve casing interposed between the motor and feeding means, said valve casing having a valve seat located therein transversely 'of said feedin means and motor, and a valve for control ing the supplyy of motive fluid to the motor, and feeding means, said valve operating in the valve seat.

'19. In a structure ofthe character set forth, the combination with a motor, of fluid operated feeding means therefor, a] valve casing interposed between the' motor and 'feedmg means, said valve casmg having a valve seat located therein transversely of said feeding means and' motor, and ports leading from the valve seat to themotor and feeding means, and a rotary valve for controlling the supply of motive fluid to the motor and feeding means, said valve operating in the valve seat.

20. In a structure ofthe character set forth, the combination with a motor, of fluid operated feeding means therefor, a valve casing between the motor and feeding means having a valve seat located therein, and

ports leading from the seat to the motor and feeding means, a valve operating in the seat, and means for supplying motive fluid to the valve.

2l. In a structure of the character set forth, the combination with a motur-,offlnd operated feeding means therefor, a eonnees tion between the motor and feeding means havmff a valve seat located therein1 and e n V ports leading from the seat to the magnand feeding means, a valve operating in* the seat, and having supply ports that move into and out-of register with the first mentioned port, and means for supplying motive fluid to the ports in the valve..

22. In a"structure of' the character set forth, comprising a body having a motor at one end and motive fluid operated feeding means at the other end, a valve located transversely in said body and interposed between" the motor and feeding means for controlling the supply of motive Huid to` kdelivering motive fluid 0.4. .In a structure of the character set I,

forth, a motor, motive fluid operated feeding means therefor, a vbody interposed between the motor and feeding means, a controlling valve having an internal chamber, and ports leading therefrom, said valve pro'- jecting from one side of the body, and

means connected to the opposite side of the body for conducting motive fluid to the internal chamber of the valve.

25. In a structure of the character set forth, the combination with a motor, of motive fluid operated feeding means therefor, a body interposed betweenv the `motor:` and feeding means, said body lhaving ava1ve seat, and ports leading therefrom to the motor and to the feeding means, a rotary controlling valve arranged ini the seat and having an internal chamber and ports leading therefrom, saidports being movable into and'out of communication with the first mentioned ports, said valve projecting from one side of the body, Aand a motive fluid feed conduit having a coupling connected to the opposite side of the body and delivering to the internal chamber of the valve.

26. In a structure of the character set forth, the combination with a motor, of feed-l ing means therefor including a cylinder member and a piston member operating in the cylinder member, a connection between one of the members and the motor located between the same, `and valve mechanism located in the connection and interposed between the motor and member for controlling the supply and exhaust of motive fluid to and fronfthe feeding means and for controlling the supply of motive fluid to the motor.

In testimony, that I claim the foregoing as my invention I have signed my name in presence ofitwo witnesses, ythis` 28th day of September, .1901. y' v WARD RAYMOND It nssnm. l l. WILHELM. 

